Under plenum pics of a '90 just for reference - ZR-1 Net Registry Forums

WydGlydJim · 12-04-2008

Thought someone might be able to use these. And what it should look like when you are finished!

billybaloneey · 12-04-2008

The one section pictured...before and after...cleaned up nicely...good job.

XfireZ51 · 12-05-2008

It might be the angle on the pics,
but those secondary vacuum canisters look like
they need to be flipped around. The lever looks
like it's should be on the other side closer to actuator lever.

WydGlydJim · 12-05-2008

Quote:

Originally Posted by XfireZ51

It might be the angle on the pics,
but those secondary vacuum canisters look like
they need to be flipped around. The lever looks
like it's should be on the other side closer to actuator lever.

As far as I know, the plenum had never been off, but i can't say that for any real certainty, just going by what it looked like when pulled, and I did not pull the actuators. However your question led me to do some digging around. They are at a kind of wierd angle, but I did check operation, and it was fine, and I found this pic, that shows roughly the same strange angle. They are not in line with the butterfly actuators, but rather at an angle. Course the angle is a little more drastic on my pc, maybe it is on backwards heck I don't know.....Wierd

jonszr1 · 12-05-2008

the angle on both my zs are the same . and they operate fine , but it allmost look that if they were turned around they would hit ? does anyone know for sure or have pics showing what they should look like .?could they have been installed wrong at the factory

Dandy97 · 12-05-2008

The first time I removed the plenum I found mine were like the ones shown. This is supposedly flipped. I flipped mine around and checked them with a vacuum pump and they no longer actuated properly. I reinstalled them incorrectly and they tested out fine, so I left them. I think if they have been backwards for a long time they should be just left alone.

A26B · 12-07-2008

When they were last available, the quality control was very poor. About 75% were defective, so be cautious & vacuum check operation before buying...... if you find any.

With all the secondary removal mods going on, there may be good used ones about.

12-04-2008	#1
WydGlydJim Join Date: Jan 2008 Location: Wichita, Ks. Posts: 318	Under plenum pics of a '90 just for reference Thought someone might be able to use these. And what it should look like when you are finished! __________________ 2009 LS9 1990 LT-5/sold/Bought my Baby back 1994 Lingenfelter LT-5/sold 1973 LS4/sold

12-04-2008	#2
billybaloneey Join Date: May 2008 Location: Mauriceville, Texas Posts: 179	Re: Under plenum pics of a '90 just for reference The one section pictured...before and after...cleaned up nicely...good job.

12-05-2008	#3
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Under plenum pics of a '90 just for reference It might be the angle on the pics, but those secondary vacuum canisters look like they need to be flipped around. The lever looks like it's should be on the other side closer to actuator lever.

12-05-2008	#5
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,406	Re: Under plenum pics of a '90 just for reference the angle on both my zs are the same . and they operate fine , but it allmost look that if they were turned around they would hit ? does anyone know for sure or have pics showing what they should look like .?could they have been installed wrong at the factory

12-05-2008	#6
Dandy97 Join Date: Jun 2005 Location: Tax Hell, Wisconsin Posts: 53	Re: Under plenum pics of a '90 just for reference The first time I removed the plenum I found mine were like the ones shown. This is supposedly flipped. I flipped mine around and checked them with a vacuum pump and they no longer actuated properly. I reinstalled them incorrectly and they tested out fine, so I left them. I think if they have been backwards for a long time they should be just left alone.

12-07-2008	#7
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,401	Re: Under plenum pics of a '90 just for reference When they were last available, the quality control was very poor. About 75% were defective, so be cautious & vacuum check operation before buying...... if you find any. With all the secondary removal mods going on, there may be good used ones about. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.